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若x,y属于R正,且xy-(x+y)=1,求x+y的最小值 若x,y属于R*,设 x,y属于R*,且xy-(x+y)=1,求x+y的最小值 设x,y属于R+,且4/x+1/y=1则xy的最小值是----- 已知X,Y属于R+,且 XY=1+X+Y,求X+Y的最小值要求写出详细解答过程，谢谢 邪代表什么意思 数学第4题第(4)道 what a pity the beautiful girl a dishonest young man 这里可以用married with吗? ______ novels often follow this pattern:a young beautiful girl who is rather helpless withno family,is abducted by a rough,dark villain who imprisons her in his castle.After much danger and possible exploitation,she is rescued by a good,pleasant youn She is a beautiful girl with have?she is a beautiful girl ( ) bright eyes and long biack hair括号里是填 with and have has 哪个. the girl is very beautiful ,especially her f() smile (x+3)(y-5)=(x-2)(y+7)的解? 2*x^2-5*y^2=7有几组整数解请说明理由 X大于0,Y大于0 X+Y+XY=2 求X+Y的最小值 山地自行车链条包装上的规格是8速, 自行车链条HG73和HG53区别自行车九速链条HG73和HG53,有什么区别呢,感觉73要好点,但是好像53的价格要贵点. 因式分解：x^-4xy+4y^-z^ 定义域为R,周期为3的函数y=f（x）,若x∈（0,1）时,f（x）=log2x,则f（6.5）=? 函数y=log2x(3-x)的定义域是 用一个5个空格的十字框在月历表中框出不同的5个数,这5个数的和最小是几?最大是几? 若xy∈R+,xy^2=4,则x+y的最小值为 普通挂历表某一竖列4个数的和是54,这4个数是? 求这个雨滴素材 雨滴接近地面的过程可以看做匀速直线运动,此时雨滴的速度称为收尾速度.某同学在一本资料上看到,雨滴的收尾速度V与雨滴的半径r成正比,由此该同学对雨滴运动中所受的阻力F作了如下几种 因式分解x的平分-4xy-4+4y的平分 He gets home (at five )in the arternoon(对括号部分提问） I think Tom is at home .(改为否定句） .He does his homework at home.(改为否定句）People usually eat dinner (in the evening).(对括号部分提问）He has breakfast at seve Tom ______(leave)home after a while .But he sometimes _____(leave) home 6 o'clock.还要说明原因 Eevery day Tom went to the market to buy food and other things .Every day Tom went to the market to buy food and other things.He put them in a big basket but he was old and weak,so he always paid another man to carry the basket homefor him.But one Sa (x-32)/16-x/60=5/3 01.x+21-x=16.5, x +0.5×2.16％x－20％×0.5×2.16％x=504.32 怎么解,方程 a+b+c=9.ab+bc+ca=24求b取值范围 what was wrong with him同义句转换 she (is taking a photo of a beautiful girl.）对括号部分提问what was wrong with him同义句转换she (is taking a photo of a beautiful girl.）对括号部分提问